//
//  NetworkTools.swift
//  测试-05-AFN Swift
//
//  Created by male on 15/10/15.
//  Copyright © 2015年 itheima. All rights reserved.
//

import UIKit
import AFNetworking

/// HTTP 请求方法枚举
enum HMRequestMethod: String {
    case GET = "GET"
    case POST = "POST"
}

// MARK: 网络工具
class NetworkTools: AFHTTPSessionManager {
    
    //MARK:--应用程序信息
    private let appKey = "71335412"
    private let appSecrest = "2cfda47422537f6493531912ee042726"
    private let redirectUrl = "http://www.baidu.com"
    
    typealias ZRSRequestCallBack = (result: AnyObject?, error: NSError?) -> ()
    
    // 单例
    static let sharedTools: NetworkTools = {
        
        let tools = NetworkTools(baseURL: nil)
        
        // 设置反序列化数据格式 - 系统会自动将 OC 框架中的 NSSet 转换成 Set
//        tools.responseSerializer.acceptableContentTypes?.insert("text/html")
        tools.responseSerializer.acceptableContentTypes?.insert("text/plain")
        
        return tools
    }()
    
    private var tokenDict:[String:AnyObject]?{
        //判断token是否有效
        
        if let token = UserAccountViewModel.sharedUserAccount.accessToken{
        
            return ["access_token": token]
            
        }
        return nil
        
        
    }
}

// MARK: - 用户相关方法
extension NetworkTools{

    ///  加载用户信息
    ///
    ///  - parameter uid:         uid
    ///  - parameter accessToken: accessToken
    ///  - parameter finished:    完成回调
    
    /// - see: [http://open.weibo.com/wiki/2/users/show](http://open.weibo.com/wiki/2/users/show)
    
    func loadUserInfo(uid: String, finished: ZRSRequestCallBack){
//    func loadUserInfo(){
        
        //1.获取 token字典
        // 1. 获取 token 字典
        guard var params = tokenDict else {
            
            // 如果字典为 nil，通知调用方，token 无效
            finished(result: nil, error: NSError(domain: "cn.itcast.error", code: -1001, userInfo: ["message": "token 为空"]))
            
            return
        }
        

    
        let urlString = "https://api.weibo.com/2/users/show.json"
        
        params["uid"] = uid
        
        
        request(.GET, URLString: urlString, parameters: params, finished: finished)
    }
    
}



//MARK: -OAuth 相关方法

extension NetworkTools{

    /// OAuth 授权URL
    /// -see:[http://open.weibo.com/wiki/Oauth2/authorize](http://open.weibo.com/wiki/Oauth2/authorize)
    var oauthURL:NSURL{
    
        let urlString = "https://api.weibo.com/oauth2/authorize?client_id=\(appKey)&redirect_uri=\(redirectUrl)"
        
        return NSURL(string: urlString)!
    }
    
///  加载accessToken
    func loadAccessToken(code:String, finished: ZRSRequestCallBack){
    
        let urlString = "https://api.weibo.com/oauth2/access_token"
        
        let params = ["client_id": appKey,
            "client_secret": appSecrest,
            "grant_type": "authorization_code",
            "code": code,
            "redirect_uri": redirectUrl]
        
        request(.POST, URLString: urlString, parameters: params, finished: finished)
        
    }
    
}


// MARK: - 封装 AFN 网络方法
extension NetworkTools {
    
    /// 网络请求
    ///
    /// - parameter method:     GET / POST
    /// - parameter URLString:  URLString
    /// - parameter parameters: 参数字典
    /// - parameter finished:   完成回调
   private func request(method: HMRequestMethod, URLString: String, parameters: [String: AnyObject]?, finished: ZRSRequestCallBack) {
        
        // 定义成功回调
        let success = { (task: NSURLSessionDataTask, result: AnyObject?) -> Void in
            finished(result: result, error: nil)
        }
        
        // 定义失败回调
        let failure = { (task: NSURLSessionDataTask?, error: NSError) -> Void in
            // 在开发网络应用的时候，错误不要提示给用户，但是错误一定要输出！
            print(error)
            finished(result: nil, error: error)
        }
        
        if method == HMRequestMethod.GET {
            GET(URLString, parameters: parameters, success: success, failure: failure)
        } else {
            POST(URLString, parameters: parameters, success: success, failure: failure)
        }
        
              
    }
}
